Means for treating ores.



PATBNTED M'AY 26,1903;

P, 1).. GROSS. MEANS FOR TREATING'ORES,

APPLICATION TILED 00'1"1 9, 1802.

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110.723.9013. I PATENTED MAY 26,1903. P. 1). uess. v

MEANS FOR TREATING ORES. yum-1:101! FILED 0012a. 1002. v no xonnL. v P s snnM's-snnn'r 2.

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No. 728,908. I PATENTED MAY 26,1903.

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MEANS FOR TREATING ORES. APPLICATION FILED 0OT.9, 1902. no MODEL. 7 v

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, PATENTED M Y 26, 1903. F. D. (moss. MEANS FOR TREATINGIORES.

APIPLIOATIOI FILED 001..9, 1902.

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WHWESSES UNITED STATES Patented. May 26; 1903.

PATENT OFFICE.

FREDERICK D. GROSS, OE DENVER, COLOR O, ASSIGNOR OF TWO-THIRDS TO TIMOTHY GOODWIN AND THE COLORADO IRON WORKS COMPANY,

I F DENVER, COLORADO, A ORP RATION OF COLORADO.

MEANS FOR TREATING ORES.

SPECIFICATION forming part of Letters Patcnt No. 728,908, dated May 26, 1903.

Application filed October 9, 11902.

To all whom it may concern:

Be it known that I, FREDERICK D. GROSS, a citizen of the United States, and a resident of Denver, county of Arapahoe, and State of Colorado, have invented a new and useful Improvement in Means for Treating Ores, of which the followingis a specification, the prin ciple of the invention being herein explained and the best mode in which I have conteml0 plated applying that principle, so as'to distinguish it from other inventions.

My invention relates to devices for treating ores, and particularly to devices forroasting gold, silver, and lead ores in which such is ore is agitated or rabbled to expose different portions of its surface to the action of the heat used in such roasting operation.

The object of such invention is to efiectsuch ore manipulation in a more economical man nor than has heretofore, in so far as I am aware, been the practice.

Said invention consists of means hereinafter fully described, and particularly set forth in the claims.

The annexed drawings and the following description set forth in detail certain mech anism embodying the invention, such disclosed means constituting but one of various mechanical forms in which the principle of the invention may be used.

In said annexed drawings, Figure l represents a top plan view of a roasting-furnace embodying my invention. Fig. 2 represents a vertical transverse section, on an enlarged scale, taken upon the plane indicated by line w org-Fig. 1. Fig. 3 represents a side elevation of a portion of the outside of the furnace looking in the direction indicated by the ar-' row in Fig. 2. Fig. 4 represents,upon an en-- 4o larged scale, a side elevation of a part of the movable hearth used in my invention, showing a part of the side plates broken away. Figs. 5 and 6 represent enlarged detail front and side elevations of driving mechanism for revolving the hearth. Figs. 7 and 8 represent enlarged detail side and front elevations of the hangers carrying the bearings for the Wheels and forming the supports for the serial No. 126.384. (NomodeL) hearth. Figs. 9 and 10 represent, upon an enlarged scale, a bottom plan View and end elevation of a section of a rabbling arm and blade used in my said invention. Fig. 11 represents, upon an enlarged scale, a vertical section of a portion of the roasting-chamber structure and hearth, taken upon the plane indicated by the line 1 y, Fig. 1, the chamber where rabbling and discharging of the ore takes place. Fig. 12 represents a horizontal section of Fig. 11, taken upon the plane indicated by the line 2 2', Fig. 11.

In the device illustrated as embodying my invention, A isa brickwork arched structure forming the top and sides of an annular oreroasting chamber A. Beneath this structure is a circular track B, upon which travels an annular hearth C, forming the bottom of the roasting-chamber and movable in the an- I nular structure A. v This hearth rests upon I-beams c, which in turn are supported upon jaws a, each forming a vertical slideway for a slidable member 0 of a bearing-box c for the axles c for the wheels 0 Figs. 6, 7, and 8. A helical spring 0 is interposed between each member c and the top of the slideway intermediate of the two jaw members, as shown, these springs receiving and distributing the vibrations which result when the hearth is moved and at same time to take up any inequalities in the hearth. A circular rack D is secured to the under surface of the hearth, Figs. 2, 5, and 6. A driving-shaft Eismounted in suitable bearings secured to a suitable stationary foundation and has secured thereto, Fig. 5, a driving-pinion E'. This drivingpinion meshes with a gear E and is mounted upon a shaft 6, secured in two hanger-plates e e. Pinion-Wheel 6 also mounted upon a shaft 6, meshes with rack D. The hangerplates 6 e are hung upon rollers. These plates are hung upon rollers e 6 which run in two grooves d d, formed upon the sides of the rack D, as shown in saidFig. 5. A The rod e is tied to the shaft E by means of two links 6 a these links 6 c forming connection between the two shafts E and e, point of fulcrum being in shaft E, object being to at all upper hearth-surface.

1 from the arched cover or top CL of the roast-' ing-chamber, are two diaphragms or walls a times maintain mesh between pinion e and rack D in case of anyinequality in rack D and grooves 61 d. Suitable means, as an electric motor D and controlling means therefor, are provided for variably driving the shaft E at the required speed. It is thus seen that by driving-shaft E the hearth may be revolved and ore carried thereby transported through the roastingchamber. Two such driving means may be, as shown, employed.

Any suitable construction of hearth-bed may be employed; but the form illustrated in Figs. 2, 4, and 11 I have found preferable. In said form brick arches rest upon the I- beams c, and a leveling-layer of cement c is superimposed. Upon the cement is laid fireproof material c suitable for forming the Side plates a are secured to the sides of the hearth to protect and strengthen its structure. 7

At intervals around the inner and outer peripheries of the structure A are placed'a number of fire-boxes A each of which is connected, by means of a suitable flue, with the roastingchamber and which together furnish heat to the interior of such chamber for properly roasting the ores. A flue A connects such chamber .with a suitable stack A At a point preferably opposite the flue A forming an integral part of and depending and a which form a separate chamber A to which I shall hereinafter refer as the rabbling-ehamber. These diaphragms depend to within a distance from the hearth such as to permit the ore to pass therebeueath, said distance being, however, such as to prevent any considerable amount of dust orother aeriform matter which might be generated therein to pass into the roasting-chamber. Two lateral openings 01. and a are formed in the walls of structure A and communicate with the interior of the rabbling-chamber, as shown in Fig. 12. These openings are covered, as will be hereinafter described. Opening a communicates with a discharging-chute A, whose exit-opening is controlled by a door or. valve a Figs. 2, 3, and 12. Directly opposite said openings, upon the exterior of the side walls of structure A, are secured top and bottom plates a and a forming enlarged slots 0, and a respectively. These slots are covered with vertically-sliding plates A which are operated to move upwardly ordownwardly by a suitable lever system, operated, preferably, by hand, as illustrated in Fig. 3 and as will be further described. In these plates are secured the ends of a number of rods F and F, passing transversely through the rabbling-chamber. In the illustrated device there are four such rods, two rods F and two rods F. Of the whole number of rods a part, the two rods F, as shown, are made rotatable in bearings f, formed in the plates A", Fig.2, the outer ends being squared, so as to permit of their rotation by means of a suitable crank F Fig. 12. Intermediate of the ends of rods F are secured a plurality of downwardly-extending rabbling-blades f, all inclined in like directions relatively to the direction of travel of the hearth. The rotatable rods F are similarly provided with downwardly-extending rabble-blades f inclined, however, in a. direction opposite to that of the inclination of blades f, as shown in Fig. 12, Fig. 10, togetherwith Fig. 9, illustrating the preferred form of construction of these blades and the method of securing same to the rods F. The opposite sides of rods F are. provided with a series of dischargingblades f inclined when in their illustrated upwardly-extending position in a direction similar to that of the inclination of bladesf Fig. 10. Itishence apparent from the abovedescribed construction that by rotating the rods F through an angle of one hundred and eighty degrees all of the downwardly-extending blades ff will incline in similar directions, thereby efiecting a result hereinafter explained. tation as that indicated by the arrow, Fig. 1, in the farther side of the rabblingchamber is placed a transverse. rod G, having a plurality of downwardly-extending fingers or pins g. On the same side of the chamber with said rod G and in proximity to the opening a. is an inclined shovel or plow H, movable up and down, and hence into and out of the path of the ore, by means of a crank-arm h upon the outside of the structure A, Fi z.

12. This shovel is adapted to divert any ore coming into contact therewith into and through opening (2L4 and into the chute A.

As illustrated, a separate lever system is provided for operating each plate A such system consists of ahand-lever F suitably journaled upon the top of the structure and having a double rocker-arm f fixedly connected therewith, two links f each having one end articulating with the ends of two rods f and f Rodsf are pivoted at their upper ends upon a fixed frame F, and the lower ends of rodsf are attached to the plate A It is thus seen that ,by swinging the hand-levers the plates may be raised or lowered, as desired.

Suitable openings A and a hopper A Fig. 11, are provided in the top of the structure A, Figs. 1 and 11, for feeding ore into the rabbling-chamber. V

In operating the above-described device the hearth is revolved, the rabbling-blades set as illustrated in Fig. 12, and ore is fed into the rabbling-chamber, and thus carried successively through the roasting and rabbling chambers. In passing through the latter the rabbliug-blades agitate the ore, exposing previously-unexposed surfaces to the heat on subsequently passing through the roasting- Referring to the direction of ro- I Each chamber. valuable (lust which is raised during such agitation is prevented from finding exit through the flue A and stack A by the depending walls a and o, and a considerable saving oi precious metal is thus ctl'ocled by the use of such incloscd and separated rahbling-eharnbcr. The pins y upon the rod G break up the rows of ore formed by the last act of nibbling-blades, and so distribute the ore more evenlyupon thehearth. \Vhen it is desired to dischargethe ore from the hearth rods F are turned, so as to substitute blade: I for bladcsf, thus causing: all the blades to be of the same inclination. The ore now coming into contact with these similarly-inclined blades is gradually moved over toward opening a and tiually discharged through same, plow ll assisting in this operation. \Vhen it. is desired to subject the exposed surface of the ore to the heatot the roastingchamber a length of time greater than would bealforded byone complete revolution of the hearth, the plates A are raised by means of the lovers and the rabble-blades so removed from the path of the ore, whereby further rabbling in avoided.

Other modes oi applying the principle of my invention may beomploycd instead of the one explained, change being made as regards the mechanism herein disclosed, provided the means stated by any one of the [allowing claims or the equivalentoi such stated means be employed.

I therefore particularly point out and distinctly claim as my invention- 1. In means for treating ores, the combinatlon 0! means torcarryingore, a series of rabbling-blades inclined relatively to the path of ore movement, a portion thereof being of inclination opposite that of-the remainder and means for replacing blades of similarinclinatlon with blades of opposite inclination whereby all blades in the ore-path may be of same inclination.

2. In means of trcatiugoroa, a series of rods carrying nibbling-blades on one side inclined relatively to the rods axes and in similar directions, one such rod being rotatable and provided with inclined blades disposed on the opposite side of such rod and having a directlon 0t inclination similar to that of ratnamed blades upon the same rod.

3. In means for treating ores, the combination of means for carrying ore, independent meansin the path of such ore for rabbling and dlscharglng name, and means for ailnultaneously romovlngsuch rabbllngand discharging means from the path of such ore.

4. In means for treating ores, tho combinatlen of means for carrying ore, arteries of rods carrying nibbling-blades inclined relatively to the path of movement of such ore, part of such rods bolng tlxed, and the reuudndcr being rotatable, such rotatable rods being pro- Any gold-bearing or otherwise vided with blades on both sides inn-lined in the same direction, means or cans-in: the blades on one side of such rotatable rods to work in opposition to the blzul is of the fixed rods to rabble the ore,and means fur-causing the blades on the other side of such rotatable rods to work in concurrence with the blades of the fixed rods to discharge the me.

5. In means for treatiugorcs, thecmnbination of means for carrying ore, a series of rods carrying rabbling-bladcs inclined relatively to the path of movement of such ore, part of auch rods lacing fixed, and the remainder being rotatable, such rotatable rods being provitlcd with blades on both sides inclined in the same direction, means for causing the blades on one side of such rotatable rods to work in opposition to the blades of the fixed rods to rabble the ore. means for causing the blades on the other side of such rotatable rods to work in concurrence with the blades of the fixed rods to discharge the ore and means for simultaneously removing such rabbliug and discharging means from the path of such ore.

G. In means iortreatingores,a furnace havinga ronsti ng-chambcr provided with a lateral dischargeopening, an annular hearth movable relatively to such chamber, means [or revolving such hearth. and means inclined to the path of movomentof the ore and adapted to work in opposition to rabble the ore or, in concn rren cc, to discharge the ore through such opcnin".

7. In means for treating ores, a [urnacehavinga roasti ng-chambor provided with a lateral discharge-opening, a separate covered rabbling-ehamber, an annular hearth movable relatively to such chambers, means for revolving auch hearth, and means inclined to the path of movemeutot the ore and adapted to work in opposition to rabble the em, or, in concurrence, to discharge the ore through such opening.

8. In means for treatingores,a furuacelntvlog a roasting-chamberprovided with a lateral discharge-opening, a separate covered rahhlingchamber, an annular hcarthJnovabIe relatively to such chambers, means for revolving such hearth, means inclined to the path of movement of the ore and adapted to work in opposition to rabble theore,or, in concurrence, to discharge the are through such opening, and means for simultaneously removing such rabbling and discharging means from the path of such ore.

9. in means for trcatiugorea, :t l'nrnacehav- Inga roasting-chamber provided with a lateral dlschargo-opening, a separate covered ralv bling-cluunbcr, an annular hearth nu-vable relatively to Hitch chambers, tuna": for revolvim: such hearth, a aerica of rods carryiug rabbliug-bladoa inclined relatively 1." LI"- path 0! movement of auch nrc, part of such rods belng fixed, and the renntiuder being: rutatable, auch rotatable rods being provided ously removing such i'abbling and disclmrg- 1o ing means from the path of sucn ore.

p itliblzides on both sides inclined in the same Signed by me this 30th day of September,

-,di rection,-means for causing the blades on ione'side-of such'rotatable rods to .work 1n op- 1902. ositiou tothe blades of the fixed rods to rob 1 Y s le the' ore, means forcnusinig thedbliidesoolrl FREDERICK GRObS 0 s 0 w r theother side of the rotatab e r \Vimesses:

in concnrrence with the blades of the fixed ""rods to discharge the ore through the said discharge-opening, and means for simultane- M. B. CUTSHA\V, N. V. Fl'r'rs.

It is hereby certified that Letters Patent No. 728,908, granted May 26, 1903, upon the application of Frederick D. Gross, of Denver. Colorado, for an improvement in Means for Treating Ores, was erroneously issued to Frederick D. Gross, Timothy Goodwin, and The Colorado Iron W'orks Company, its joint owners of said invention; whereas the patent should have been granted to said Frederick D. Grols and The Colorado Iron Works Company, they being sole owners of the entire interest as shown by the assignments of record in the Patent Oilice; and that the said Letters Patent should be read with this correction therein that the same may conform to the record of the case in the Patent Ofiice.

Signed and sealed this 30th day of June, A. 1)., 1903.

[sEALJ E. B. MOORE,

Acting Conum'ssioner of Patents.

Correct 0t lii heii rs l dgriilltfidildB.

I "thei'other side of the rotatable rods to work p itli'blades on both sides inclined in the same direction, means for causing the blades on Jone'side-of such'rotatable rods to .work in opposi tiou tothe blades of the fixed rods to rab- "hle the' ore, means forcausing the blades on FREDERICK GROSS \Vitnesses:

M. B. CUTSHA\V, N. V. Firm.

in concnrrence with the blades of the fixed ""rods to discharge the ore through the said discharge-opening, and means for simultane- It is hereby certified that Letters Patent No. 728,908, granted May 26, 1903, upon the application of Frederick D. Gross, of Denver. Colorado, for an improvement in Means for Treating Ores, was erroneously issued to Frederick D. Gross, Timothy Goodwin, and The Colorado Iron W'orks Company, as joint owners of said invention; whereas the patent should have been granted to said Frederick D. Grols and The Colorado Iron Works Company, they being sole owners of the entire interest as shown by the assignments of record in the Patent Ofiice; and that the said Letters Patent should be read with this correction therein that the same may conform to the record of the case in the Patent Ofiice.

Signed and sealed this 30th day of June, A. 1)., 1903.

[sEALJ E. B. MOORE,

Acting Commissioner of Patents.

Correction in Letters Patent No. 728

It is hereby certified that Letters Patent No. 728,908, granted May 26, 1903, upon the application of Frederick D. Gross, of Denver, Colorado, for an improvement in Means for Treating Ores, was erroneously issued to Frederick D. Gross, Timothy Goodwin, and The Colorado Iron Works Company, as joint owners of said invention; whereas the patent should have been granted to said Frederick D. Gross and The Colorado Iron Works Company, they being sole owners of the entire interest as shown by the assignments of record in the Patent Office; and that the said Letters Patent should be read with this correction therein that the same may conform to the record of the case in the Patent Ofiice.

Signed and sealed this 30th day of June, A. D., 1903.

[SEAL] E. B. MOORE,

Acting Commissioner of Patents. 

